Machine tool



May l0, 1949.

F. J. HENKEL MACHINE TOOL F. J. HENKEL May 10, 1949.

MACHINE TOOL Filed sepf. 16, 1944 8 Sheets-Sheet 2 F. J. HENKEL Malyy10, '1949.'

MACHINE TOOL 8. Sheets-Sheet 5 Filed Sept. 16; 1944 Snventor /Qf l Ae@by Cttornegs F. J. HENKEI.

May l0, 1949.

MACHINE TOOL 8 Sheets-Sheet 4 Filed Sept. 16, 1944 F. J. HENKEL May 1o,1949.

MACHINE TOOL Filed Sept. 16, 1944 8 Sheets-Shed 5 BNN.

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fTf/f; @d Jj@ Bg mw/f6 Mttornegs May 10, 1949.

F. J. HENKEL MACHINE TOOL 6 mw/6 m .M m /M f f w J 8 Y .d M a e S1 NN.rml T .Bu mwN .f/ f/// m, m RMN 1 w. ,n nv s .m N\ 1 l .n

F. J.v HENKEL May 10, 1949..

MACHINE TOOL 8 Sheets-Sheet '7 Q w l Snoentor Fefdyfyp/ J f/ff/ee/ 8'M/f @07 a i -l Cttornegs www.

A /A (Ar NN.,

Filed Sept. 16,' 1944 m i SQ L v W` wmv May1o,1'949. F, J, HENKEL2,469,920

MACHINE T001J Filed sept. les,v 1944 a sheets-sheet s atto-megs PatentedMay 1Q, l17949Y Ferdinand J. Henkel; Roy tLainiat Dies and Toc al'J 'ak,Micha, assign'or lst Inc.; Berkley, Mi'chf.,

a corporation of Michigan Appl-iation Septeme'r 16, 1944;', serii N6;554,356,

'riteV present invention` relates teme'ehirre toois'; andmore-particularlyto' a` machine to'ol for 'rn/ark?" ing dies eindY thelike where: en extremely' high* degree ofprecision is' required;

Theprimary object of tlef invention is t'oproe vide' a machine tooli'nwhich the'work t`o`` oeop'`-` e'rated uponl is mounted] for'V rotary;and conipound 'sliding movement tov facilitatei theI porsiL` tioning' oithe' W'ork With` respect to` the' cutting", t'ooi during" the cuttingoi; arcuateportions" as Weil as` straight line-portions tangent=thereto" with' a* high degree of efciency and precision.

Anotherv oloject" of" the-invention isto" provide` erwork tablernounle'o`lI for'rotary movement' and lia-ving detentmeans for looking'the-rotary care" rier inA variousY predeterminedang'ular positions"fa-nd rat'lt'ende'gree spac'eda-part locations't'hrouglionttheentiret360 degree revolutim;`

Another Objectis to'p'rovidea rotary'work-sup'' port which' hasvitp'ermit theAA offsetting' ofy the Work" from" the 'center oftherrotary Worksupport and'itoprbvide* ia `cutting tool"and:carriage-the'refbr havingA riiean's" Jfor traversing saidWorkrcarrier'or supporidiai metrica-ily withrespe'ctftosaid'retaryfwrk'stipeport to produce-j various arcuate cuts'A an'dpe'i'rr'1'it-- the quick-1 and easy"`adu"strnent of'tlie"Work"tothe'Jrequired location With respect:A t'o'I the "cutting tooI during vsaidarcuatecut. l

Another` object of theinvention is= to provider' 'a rotary Work spportfan'tiy ii1 i`e`Xin',f-'head4 With the indexing head1 mounted forcompound re'cl' tilin'earv movementso'a's13o-position theiw'ork oifsetfromth'eaxis of the'r'otary Work carrierandpermit-m'oven'fientciter-point5 on' saidfw'orlin' ari'v arcuate'patlib'en'ea'th theiciitter-While'in oifj-A set position soa's to -cutthe'fwrk an'arcua'tef path' or 'form as Welles-permitting "the puttingoi"n straight-line portions tangent'tb the arcuate path orfaf'ny-V otherirregular path* or`` shape' desired."

'Anetnenobjeet-is/t'oiprbvidea; rotary' work supe port'havingmeans forlocking lvtheeamer/it spaced` intervals oi ten degrees andjt'o provide'micro@ metriclmeans for adjusting' therot'ary Work sup# portintermediatethewen degree' locations or* at any'desirednumb'er ofvdegr'e'esf 0th`er"thari` muli-.iiUV ples ioften. p y

Another 'obj ect of the invention is-'to 'provide-'a machine toolh'avirigf a`L rotary Work 'table of' thier! aboveernentioned" type-fwhich' is: adapted to'rioe"J 502` manually' or mechanicalliwrotate'dseryas to f per# mit suitable -clutch* means* between" said mantieni:kandmechanical mean'slso aslto ip'e-ririit tHe-altere" nate;I usethereof-f and-ith tsirnltarieoil'slyf control@ the s detentlz mechanismscft'tlitttlthe'l rotaryif were@ affixed thereto a compound" slide'* 20zsired toA position the Werk teb'ie et a predeter:

' mined eingular'location;

Another object of thelinvention is to provide5 suitable control mec:hanisrn for the rectilinearlly movable slide andto graduate's'ald'controlmechf anisin' in'` such a manner as toobtainI a relativelyhigh' degree of precisionv a "dthe' production of work pieces- Withinv arelatively` small tolerancer'a'nfg'el a N Another` object oftheinvention islt'o' provide a machine tool of; the' aboveementione'dcharacter iii-writer;- tne reati neeriy-iiivbie slide rrieriileers2 maybe mecriairiioally or" manually 4adjsted to provide means-"for lookings'aid" v'tiline'arly Inov-v` aoieslidesl i tli'e'ii" adi'u'Stedposition"l Another objectwojf the i ventio'n is' to'provid machine t'jolo'f the' eibov'eiin'entioned characterr having an indxin g" lie' E so aSto permit the"r ettguiarltievenjieritefthe werk toetpredeterminedposition@ o'fefrorn thev axis; of ytherotary Wrl support or head and toprovide rep1aceab1eterrf=' plates'rv forI the* indexing" head Witiicircumferetially' spaced? notples' corresponding to the po?" siti'onsinWhichthe yvork'is' to 'nen out;

Another" object o'i the' invention" is"` to provide" alira/chine?toliofj the above-rn'entionedtybe' havingJ a cutter carriagewhich is-niovable ac'ros's theJ diameter o'ff the rotary1 Work supportand which identified-'with means fefmenuetuy orn'ieeh'err-w iettiiyadjusting' or causing' seidfearriage to tier: erseftiiediaietero'ffsaidwerk'suppert and alsoY metterne means for' edjpsting theejuttei" tej various positions of singularity inv`rtica1 a'ridrie-riz'oriteirpinesa Another objeet-ertiie inver'itin' is to providea"ttieeiiiiie teei Vtiet/ing'lerreeirsrojeating cutter the5 l'en'gtlfi of'St'ifik"A OFWiiChiri be'a'dj usted to' any" desired length depending onthe thicknessofthe* Workbeiiigdpeatedfliponf; A

Q therobjeete andfetetreintjeges" er the inventidri Willi become'apparent during' theg course' of the"folletvin'g-l'de'seriptie'ntortrieeeceinpenying dreef:- ing's'; WhereiifFigure 1 is a front elevationa'lvievt`-r ofthe ma``chiiietbl'showing-'the arrangement of theseveraif parte eneriu'dstrsiting'1` the position r oft trie movable eiitter-1 memberrelative, ter the work*V support Figure 2 is a topplinVeWf-ofamachinetool" iiiiietret-iiief the=-gerieretifarretrieemeiitioi` the severe-1parts-arid siret/ing pertien ef; one of trie freifxef-:dpiieiitsltierenLv illustrater tite'i drive mechanism for the movable cuttercarriage;

Figure 3 is an enlarged fragmentary iront elevational view of the cuttermechanism illustrating the manner in which the carriage is supported andshowing the cutting tool mounted for reciprocation thereon;

Figure 4 is an enlarged end elevational View of the cutting toolsupporting carriage further showing the manner in which the same issupported for sliding movement and the various adjustments for thecutting tool;

Figure 5 is a vertical cross sectional view taken on line fi- 5 inFigure 3 looking in the direction of the arrows and illustrating-a cammember for adjusting the angularity of the cutting tool from a positionperpendicular to the work table;

Figure 6 is a diametrical cross sectional view taken on line -5 ofFigure 2 looking in the direction of the arrows and illustrating theVarious structural details of the compound slide and the indexing headcarried thereby;

Figure 7 is a vertical cross sectional view taken on line 'i-'l ofFigure 6 looking in the direction of the arrows showing the drivemechanism and brake structure for controlling one of the rectilinearlymovable slides;

Figure 8 is a horizontal cross sectional View taken on line 8 8 inFigure 6 looking in the direction of the arrows and illustrating theremovable indexing plate for locking the indexing head in a preselectedangular position depending upon the number and placing of the notchesformed in the removable indexing plate;

Figure 9 is a top plan view of the compound slide with the indexing headremoved therefrom;

Figure l is a fragmentary plan View of the indexing head showing aportion thereof broken away for the purpose of illustrating variousstructural details thereof;

Figure 1l is a fragmentary top plan view of the bed or base portion ofthe machine tool illustrating the micrometric adjusting mechanism forlocking the rotary work table in a predetermined angular position;

Figure 12 is a vertical cross sectional view on line l2-l2 of Figure 11looking in the direction of the arrows and further illustrating themicrometric adjustment and detent mechanism for controlling the angularmovement of the rotary work table or carrier;

Figure 13 is a vertical cross sectional view taken on line l`3-l 3 ofFigure 11 looking in the direction of the arrows and illustrating thevarious structural details of the detent slide mechanism as well asvarious details of construction of the micrometric adjustment therefor;

Figure 14 is a vertical cross-sectional View taken on line I -lll ofFigure 13 looking in the direction of the arrows to illustrate themanner in which the rotation;

Figure 15 is a vertical cross sectional view taken on the oblique line|-l5 in Figure 11 showing the alternate control means for rotating therotary work table or carrier and illustrating various structural detailsof the drive mechanism and the clutch structure;

Figure 16 is a vertical cross sectional view taken on line lG-IS ofFigure 11 looking in the direction of the arrows illustrating the clutchcontrol mechanism and the mechanical drive for the rotary work table orcarrier; and

Figure 17 is a vertical cross sectional view taken on line ll-ll ofFigure 1 looking in the direction of the arrows illustrating variousstructural detent adjusting bar is keyed against Brief description ofthe invention Broadly, the invention comprises a rotary work carriermounted on a suitable base or bed and provided with means for rotatingsaid carrier as well as means for manually moving said carrier tovarious angular positions so that the carrier may be locked in saidangular positions and held against displacement. In order to enable thework carrier to be mechanically and manually controlled, a suitableclutch mechanism is provided so as to drivingly connect the manualcontrol means to the rotary work table in one of the two clutchingpositions of said clutch and to drivingly connect the mechanicalrotating means with said carrier in the other of said clutch positions.When the clutch mechanism is moved to the rst-mentioned position, adetent mechanism is operated to project a locking bolt into engagementwith one of a series of recesses in a work table which arecircumferentially spaced ten degrees apart so as to facilitate thepositioning and locking of the work table or carrier in a number ofdifferent angular locations. Micrometric means is provided for adjustingthe detent to accommodate angular positions intermediate said ten degreespacing so as to permit the setting of the table at any desired angulardegree of rotation.

The cutter carriage for the reciprocating cutter is mounted directlyabove the rotary work table or carrier to move diametrically across theaxis thereof and suitable control mechanism (both manual and mechanical)is provided for moving the cutter carriage to either a predeterminedposition or for driving said carriage at a relatively slow rate ofspeed, so as to feed the cutting tool with respect to the work. The workis mounted on an indexing head carried by a compound slide secured tothe rotary work carrier or table, and said compound Slide is controlledby manual and mechanical means to permit the offsetting of said indexinghead relative to the cutting tool when the rotary work carrier is beingmoved to cause the cutting tool to describe various cuts in the workpiece. The indexing head is provided with a removable and replaceableindexing plate for moving the work to various angular positionscorresponding to the cut desired in the work piece so that by removingsaid indexing plate and replacing the same with one having differentlyarranged circumferentially spaced notches, the work may be brought intoproper register with the tool which as mentioned above, is mounteddirectly above the rotary work table or carrier.

The various adjustments of the machine tool are calibrated to aord thehighest possible degree of precision and the production of work piecesto the exact dimensions required. Further, the reciprocating cuttingtool is mounted on the slide in such a manner as to facilitate theadjustment thereof in different planes at right angles to one another sothat the cutting tool may be angled from the perpendicular for thepurpose of cutting work pieces requiring slightly tapered walls such asdie members and the like. Various movements imparted to the rotary workcarrier or table and compound slide as well as the cutter carriage areaccomplished by means of reduction gearing and motor drive mechanism soas to produce the necessary cutting speed when various angular positionsso that the detent bolt 61 may be moved through an arc of approximateten degrees (Figure 13), an adjusting rod |00 is arranged in a recess inthe top wall portion I8 of the base 5 and said adjusting rod has one ofits ends journalled in a bearing bracket |02 affixed to the bottom Wallof the recess |0| by screws or the like as at |03. The adjusting rod |00is provided with a longitudinal slot |04 (Figure 14) for receiving a key|05 held in a slot |06 in the bearing bracket |02 by means of one of theanchoring screws |03 so that the inner edge of said key will projectinto said key slot |04 and prevent relative rotation of the adjustingshaft |00. The inner end of the adjusting rod |00 extends into a cavity|07 extending inwardly from a lateral projection |03 (Figure 11) formedon said adjustment arm 55 and mounted in said cavity |07 transversely ofthe lateral extension |08 is a roller or pin |05 to present a curvedsurface for contactual engagement with the extreme inner end of saidadjusting rod |00.

The other end of said adjusting rod |00 projects into a bearing memberH0 (Figures 11 and 13) received in a recess in the floor of the recess|0| and said bearing member is held in place by machine screws or thelike as at I2. The outer end of the adjusting shaft |00 is slightlyenlarged and screw-threaded as at I3 and extends into the bore ||4 ofsaid bearing member H0 and is drivingly engaged within a tubular nut H5the bore H6 of which is screwthreaded to correspond with the screwthreads ||3 on the adjusting shaft |00. One end of the threaded tubularnut ||5 is flanged as at ||7 and is received in the enlarged portion H8of the bore ||4 as illustrated in Figure 13. A tubular sleeve l0 isiitted in the enlarged bore 8 of the bearing member i l0 and has itsange |20 held in piace by machine screws or the like as at |2I.Anti-friction bearings |22 are interposed between the end of the sleeve||0 and the ange to permit free rotation of the tubular threaded nut|I5. Secured to the tubular bearing member H0 is a disc |24 held inplace by suitable screws and said disc is provided with an opening |25for permitting the rotary tubular nut ||5 to project therethrough sothat a hand wheel |25 may be axed thereto by the clamping plate |27 andmachine screws |28. The extreme outer end of the shaft |00 is reducedand graduated as at |3411 so as to slide in and out of suitable openingsin the tubular threaded nut ||5 and clamping plate |27. The hand wheel|26 is keyed to the rotary tubular threaded nut H5 as at |30 and ahandle |3| is secured to the hand wheel |26 as at |32 to facilitaterotation of the tubular threaded nut ||5 to thereby impart longitudinalmovement to the adjusting shaft |00. The disc |24 is provided with agraduation mark 33 adapted to register with a series of graduation marks|34 on the peripheral surface of the rotary hand Wheel |26. The screwand nut H3 and H5 respectively provide a micrometric adjustment for theadjustable arm 56. It is intended that the graduations |34a on the outerend of the shaft |00 and the graduations |34 on the hand wheel |26 bemarked to denote trigonometric sine functions so that once the angle ofrotational adjustment of the table 6 is determined, the sine of saidangle may be determined, by consulting a trigonometric sine table, andthe shaft |00 adjusted by setting the same to correspond with the sinefunction of the angle.

Rotary work table and operating mechanism therefor Mounted on the upperend of the rotary shaft 34 (Figure 15) is the rotary work table orsupport 6 and said support is of disc-like construction and includes abody portion |35 having a peripheral depending ilange |30. The centralportion of the rotary work support 6 is provided with a round recess |37for receiving the flanged end |38 on the enlarged portion |30 thereof(Fig. 15). Machine screws or the like as at |40 are provided for holdingthe ilanged portion |38 of the shaft 34 within said round recess |37.Extending inwardly frorn the peripheral surface of the depending ange|36 is an annular recess |4| and mounted within said recess is a seriesof blocks |42 fastened in place by means of suitable machine bolts orthe like as at |43. Formed in each of the blocks |42 is a notch |44(Figure 1) the side wall of which as at |45 is angled to receive thebolt 67 in such a manner as to center said rotary work table or support6 at exactly ten degree spaced apart distances. The side walls |46 ofsaid blocks |43 are perpendicular and cooperate with the notches |44 toprovide a straight wall surface for engaging and receiving the upper endof said bolt 07. It will thus be seen that as the rotary work table 6 isbrought into approximate registry with the bolt 67, the projection ofthe bolt will cause the upper end thereof to engage the inclined wall|45 of the notch |44 and thereby move the rotary Work table or support 5slightly in a counter-clockwise direction so the table is exactlypositioned on said ten degree marking. The top wall |47 of the Worktable is bevelled as at |40 and is provided with a series of graduations|45 aligned with the straight wall surfaces |45 of the blocks |43. Apointer |50 is affixed to the cylindrical portion of the bed by means ofscrews or the like as at |5| so that the end thereof as at |52 willregister with the series of graduations |49 as indicated in Figure l.The graduations |49 are spaced an angular distance of ten degrees fromone another so that the rotary table or support 6 may be turned throughany number of graduations and locked in a radial position of ten degreesor multiples thereof.

In order to facilitate the rotation of said work table or support d(Figure 15), the under side thereof is provided with an annulardepending rib |53 having a recess for receiving a ring gear |54 providedwith external teeth |55. The ring gear is held in place by a machinescrew or the like |56 to the under side of said annular depending rib|53. The round intermediate portion I8 of the bed or frame i3 isprovided with an opening |57 (Figure l5) for receiving a bearing sleeve|58 which is adapted to rotatably support a rotary shaft |50. Suitablebearings |60 and |6| are mounted in the upper and lowerrnost ends of thetubular bearing support |50 respectively to permit free rotation or'said shaft |50. The uppermost end of the rotary shaft |50 is providedwith a pinion |62 adapted to mesh and drivingly engage the ring gear |54so as to rotate said rotatable support or table 6 upon rotation of theshaft |59. A thrust bearing |63 is mounted on the lower end of the shaft|59 and is located between the tubular bearing support |53 and the hub|64 of a cone clutch |65. Rotatably mounted in a bearing |66 secured ina `bearing boss |67 of the curved front wall I6 of said frame I3 is arotary shaft |68 rhaving a'ixed to one end thereof a hand wheel |69 tofacilitate rotation of said shaft 9 while the .other end of :said .shaft.is provided with .a .bevel .gear 41|? .adapted .to,..rnesh anddrivingly engage bevel .gear teeth formed ,on ,the cone clutch .memberi595. Ime .other ,cone clutch ,element 11.2 .of said cone .clutch .liteis vcarried vby a rotaryshaft ,|13 and keyed `to .the upper .end thereof.by .means ,of `keys or the like as at |14. The ,upper-.endet the shaft.|13 is provided with ,an axial .bore .H5 vfor .receiving' a projection|19 onthe -endo ,the shaft .159 so 4as to retain said shaft |13alignment with the shaft |59. The lower end `of the-shaft .11.3

received in -a gear housing .|11 which lisfsupported on an inwardly:extending shelf .or platform |18 formed integral with and extendinginwardly from `the arcuately curved .frontwall |13 of .the intermediateportion .o f said .base .or '.bed .13. Machine screws or the 4like ,|19.are .provided y for retaining ,the .gear `casing |11 in place .and itis to be noted .that a through .an opening `|89 inthe .front curved walll5 of the machine .bed-or .irameof sufficient size to cpermit theremoval of said gear casing for the .purpose .of repairs or the like.The shaft .|13 is iournaled .in suitable anti-friction .bearings |81 and|82 in the top and bottom walls rof `the gear casing |1-.1 respectively,and keyed .to .said shaft intermediate .said anti-frictionbearfings.is a.worm wheel |83 adapted .to be .drivingly .engaged .by .a ,worm .|84(Figure 1-6) on '185. The driveshaft -|95 is rotatably .mountedin an.extension '|96 formed integral with .the gear casing |11 and issupported by .antifrictionbearr ings |81 and madjacentieachendof the.casing extension .|65 (Figure 11),. The .shaft |935 .is vadapted ,to be.driven b y an ,electr-ic motor having athymc-trol reduction unit seasto facilitate ro,- tation of `said shaft |85 .at a relatively slow rate.of speed.

The thymotrol control motor unit may .be .of

electronically controlled .type or, ,if desired, .other types of speed.reduction units may be employed.

The clutch element |12 .of .the .cone clutch |95 I (Figure l5) has itscol-lar |89 grooved as .at .|99 to receive a ring |91lhaving.diametricallyopposed pins |92 for being received in suitable'openings formed in the yoke arms 9S .as villustrated in Figure 16. Itwil-1 .thus be `seen that operation Of the shaft B9 by the control lever.99 will .pro-

lect the bolt |51 and simultaneously disengage the p,

` and il?. so .as .to permit operation of the hand 4wheel |59 .andimpart ro.- tation to the rotary work table support I3 .a pre.-determined distance so as to vbring the .bolt .9.1 into registry withone of .the notches .|44 .and place the rotary work table .an angulardistance `from the reference l.point A52 .Nhen fthe rotary Shaft 89 ismoved `in Vthe reverse direction by the .control lever .9.9, the bolt 91will be withdrawn or retracted and the clutch parts 1,65 .and 11;?nengaged s0 as to permit the rdriving.of -said table through the ,gearingand gear housing |99 .by the thymotrol controlled motor connected to theshaft |85.

Compound slide structure Secured .tothe 4top wall M9 (Figure l) .of therotary work table or :support 5 :is a slide table i9?, which is .held inplace by means of suitable bolts .|99 extending through a dange |95thereof .and said table comprises .a top 'wall |99 and side walls |191as illustrated 1in Figures v6 `and 9. .The top .it-'ii oi the .slidetable is transversely recessed or `grooved adjacent each end as at :|99fior ree ceiving slide .bars L99 held in place by means of machinescrews .or vthe like as at '299 1(Figure 9)..

clutch part elements .|95

portion .thereof .projects .f-

.a suitable drive ,shaft 1.0 Extending `transversely of the :slide table:|93 and .parallel lwith 'the 'slidefbars `l 99 gis a longitudinal:recess 29| and slidably .mouun'ted on the top `|99 of the v'slide tableis 1a :slide 202 bhaving comple .mentary slide guides 203 for :restingupon the slide bars 1h99. The slide guides 293 are mounted -intransversely extending recesses .similar :to the 4grooves |98 fand areheld 1in Aplace by machine screws or the like :as at 291i. .It will thusbe seen that the slide 29.2 'may move transversely relative to the slidetable |93 and to 'facilitate the sliding movement thereof (Figure :69yfa. threaded .block 20ML 'is secured T,by screws 295 tothe 4undersideof the slide 4292 and Yis ,adapted vto depend downwardly into the`longitudinal slot .or groove 291|. The block 299e `is provided with athreaded ,opening 296 for 'receiving a feed screw 291 housed within thetransverse grooves or longitudinal slots 2,91. @ne fend of 4the 'feedscrew '291 is reduced -as-at V208 and fisireceived in albearf ing Eblock299 held :inplace kby Aa short stud 2li) which 'is received fin an-opening 2||| vat one fend of the longitudinal slot '.or Vgroove 2 0 nretaining washer 212 is held in place -by a machine screw or the like,2L-3 to -prevent aXia-l 4.or .endwise Vmovement :ofthe :feed screwshaft29.1. rThe opposite end of the-screw feed shaft 2191 is supported 'by laIbearing rbracket' 2M which has its flanged portion -2f|5 secured :tothe slide table |93 .by machine screws or other fastening elements :andsaid 'bear-ing bracket is provided with a `bearing portion y2;||3 havinganti-friction bearings 2'I1 fior engaging fan annular enlargement 2H! on.the screw-'threaded feed shaft 291' 'so a-s :j to prevent end thrustand retain Vsaid shaft in position. Agear casing |9 is aXed-to thebearing portion 219 land `the :bracket .2l-t by vmeans of screws or thelike :as at 229 -and said gear housing `is positioned Vso i.as toyreceive the extreme outer end of the screw feed .201.

Rota-tably mounted on the send of the screw feed shaft .201 .fis .-a`wor-.m wheel 22| having .its hub 2.22 .in vabutting .relationship withtheannular enlargement 2f|38 as yillust-,rated in Figure 6.. Secured tothe end of the feed .screw 201 is la hand wheel 2.223 held in place by aretaining washer 224 by "means o f a screw or the like 22.5. A key 226is provided Afor -drivingly `connecting the hand wheel to fthe :screwfeed 291and a handle 221is :mounted onrthe han-d wheel `to impartrotation'ft-hereto. The gear housing 249 is .provided with anoffsetportion v228 (Figure 7) havingantifriction :bearings .229 and 22|!at each 4end thereof for supporting .a drive sha-ft 23|. A worm 232 isysecured :to the dri-ve .shaft `and fis Iadapted to driving-1y engage'the worm wheel 22| -so as .to impart rotationto the yscrew feed 291 byrnechanical means. An electric'motor may be supported by the bearinglbracket 2|4 -or gear` housing 219 Withits narmature shaft in :alignmentwith the drive 'shaft 221 so as 4to be coupled thereto by` means .of :aYltl'lymotrel speed reduction unit similar to the drive shaft |85 Lasexplained in connection with the rotary work ftable or supportl 6. Inorder to .drivingly connect the hand Vwheel .223 with the worm -wheel22| when it is desired to :manually rota-te :or control the feed screw.291, a :friction clutch element is provided and said friction clutchelement. includes `an expansible shoe member 2.33 mounted on a stud 234secured to the worm wheel 22|. l'The friction 'shoe 233 -is located in.a recess or annular .cavity 235 in one of .the radial walls of the wormwheel 22| so that when .said kfriction .shoe element is expanded, thesame will engage .the 'interior peripheral wall of said recess 235 andlock said friction shoe element thereto. In order to expand saidfriction shoe element 233 a shaft 236 (Figure 6) is mounted in asuitable bearing in the hand wheel 223 and said shaft is provided with acontrol cam 231 on one end thereof for engaging the ends of saidfriction shoe element 233 and eX- panding the same upon rotation of thecontrol shaft 235. A control knob 238 is axed to the outer end of thecontrol shaft to facilitate manual rotation thereof and permit the handwheel 223 to be locked to the worm wheel 22| for the mechanical drivingof the screw shaft 201.

Movably mounted on the screw feed 281 is a telescopic sleeve 240 (Figure6) having a reduced threaded portion 24| for receiving the threadedportion of the screw feed 201. The opposite end of the telescopic tube240 is enlarged as at 24| and provided with a handle 242 (Figure 9) tofacilitate the rotation of the telescopic tube 240 along the threadedportion of the screw feed 201 so as to protect the same against metalchips nding their way to the feed screw 201.

Slidably mounted on slide 282 for movement in a direction at rightangles to the sliding movement of said slide 202 is another slide 243(Figure 6) having parallel longitudinal grooves 244 adjacent each edgethereof for receiving slide guides 245 which are held in place bymachine screws or the like as at 246. The slide guides 225 are adaptedto ride on slide bars 241 mounted in parallel grooves 248 in the top ofthe slide 202. Machine screws or the like as at 249 are provided forholding the slide bars 24.1 in position and against removal from theparallel grooves 248. The top Wall of the slide 202 is recessed as at250 for accommodating a rotary feed screw 25| which is supported at oneend of the slide 202 by means of a bearing bracket 252 (Figure 9)similar to the bearing block 208 but held in place by being integratedwith the underside of the slide 243 at one end thereof. A retainingwasher 253 held in place by a screw 254m is provided for holding thefeed screw 25| in place against axial movement.

Mounted on the underside of the slide 243 ad jacent the opposite endthereof is a bearing bracket 254 held in place by machine screws or thelike as at 255 and said bearing bracket is provided with a threadedopening 255 threadedly engaging the screw feed shaft 25|. The oppositeend of the feed screw 25! is supported by a bearing bracket 251 (Figure2) having an enlarged bearing portion 258 at one end thereof and beingflanged as at 259 at the other end for attachment to the side wall ofthe slide 222. A gear housing 260 is carried by the free end of thebearing bracket 251 and is identical in construction with the gearhousing 2 i3 shown in Figure 6. A hand wheel 26| is keyed to the feedscrew 25| and is provided with a handle 262 to facilitate rotationthereof. An electric motor 263 having a thymotrol speed reduction unitis supported by the gear housing 250 so that its armature shaft may bedrivingly connected to the rotary feed screw 25| by means of anexpansible shoe element similar to the shoe element 233 by manuallycontrolling the knurled control member 238 on the hand wheel 26|.Rotation of the knurled hand control 26d as in the case of the knurledhand control 238 will effect the alternate connection of the motor 253to the rotary feed screw 25| in substantially the same manner as pointedout and described in connection with the manual and mechanical driveshown in Figure 6.

" tained therein Work holding structure and indez'ng head Mounted on theslide 243 (Figure 6) is an annular casting 265 flanged as at 268 forreceiving anchoring screws or the like as at 267 so as to securely boltsaid annular casting in place. The annular casting is provided with aninwardly extending flange 268 having an annular recess 289 for receivingthe outer race member 212 of an anti-friction bearing having rollerthrust bearings 21i. The annular flange 258 terminates in an opening 212which is adapted to receive a rotary drum 213 which is provided with anannular flange 214 arranged in abutting relationship with the inner racemember 215 of said anti-frction bearing. A retaining disc 218 is held inplace by means of a machine screw 211 so as to prevent displacement ofthe drum 213 by reason of the fact that the retaining disc 216 overlapsthe edge of the opening 210 by a suicient amount to prevent upwardmovement thereof. A bearing washer 218 is interposed between theretaining disc 216 and the under side of the inwardly directed flange268. A grease-retaining shield 219 is anchored to the inwardly directed.ii-ange 258 within an annular groove 280 thereof so as to retain greasein the anti-friction bearing 21| and prevent the entrance of foreignmatter thereto.

The central portion of the drum 213 is provided with a tapered bore 28|(Figure 6) for receiving a centering plug 282 secured to a work holdingdisc 283. The centering plug 282 is flanged as at 284 and this portionis received in an annular opening 285 in the underside of the workholding disc 233 so as to be securely reby means of machine screws orthe like as lat 286. The top Wall of the work holding disc 283 may beprovided with a series of radially extending undercut slots 281 forreceiving the head of an anchoring bolt or other work holding fixture.

Interposed between the Work holding disc 283 and drum 213 is an indexingplate or disc 288 having a central opening 289 for receiving thecentering pin 282 ras illustrated in Figures 6 and 8. The indexing disc288 is provided with radially disposed apertures 290 for receivingretaining bolts 29| which extend through openings 292 in the workholding disc 283 and have 'their lower ends received in threadedopenings 233 in the drum or head 213. A series of circumferentiallyspaced notches 204 are formed in the peripheral edge of the indexingdisc 288 and are Iadapted to be engaged by a detent to retain the Workholding disc 283 in a predetermined angular position.

The annular casting 255 is provided with an annular recess 295 for thereception of lan annulus or ring 286 which is freely rotatable in theannular recess 295 and is provided with a relatively fiat wall surface29'.' forming a seat for engaging the under surface of the rotary worktable 233 so as to support said work table or holder Without permittingwobbling or uneven motion thereof.

The annulus or ring 296 is cut away -as at 298 for receiving a detent288 which is held in place by a short pivo-t pin 300 (Figure 8). One endof the detent 23.9 is arcuately curved as at 38| and terminates in alaterally extending portion 382 shaped like and engageable with any oneof the notches 2.92 in the indexing plate or disc 238. The other end ofthe detent 293 is provided with a handle portion 383 to facilitate themovement of the detent 30|. Inwardly extending from the annular recessor groove 295 is an annular dovetailed groove 303 in which there isreceived an araccadere cuatelv curved dove-ta'zed :locking nlate '5&5adapted to be moved into clamping position in the dove-:tailed .slot'3.94 .by means .of a clamping screw as at 3.6.6. The clamping screwenten-ds lthrough an opening in the .ring 2.96 with its inner threadedend received in a .correspondingly threaded opening :in the arcuatelvcurved doveltai-led .clamping .member 305.

1t is intended to provide .a plurality Aof indexingl discs 28.8 forvarious purposes and different types of ywork with the detent notches:2.9.14 spaced rait various-circumierential distances from .one an.-other so that indexing of the `work may loe accomplshed at pointscorresponding to theloca.-

ation .of the detent .notches ,29.4. One ledge of y.the

:slide table 19.3 .is bevelled -.(Figure .l .and pro vided with a seriesof graduations [93a -so that a militer 211211 axed tto .the :slide 26.2:may liegis'ter therewith to indicate the relative :movement .loetween-t-he .slide table |93 andslide 21M.. Similar- 1 y,.one edge ci theslide :2912 .is .loevelled inthe direction `of slide movement and islgraduated :as -at a02@ so that a pointer 24.31;'. ardired to the slideri243 may register `therewith and indicate the dis- ,il'fan'e 'that the:slide 243 is moved relative :to the `slide 262.

Cutting tool carriage and traversing screw therefor Mounted upon .the.horizontal guide hars 2,6 isa l .a r:pair `vof lspaced tubular.castings et? .and 3tlg Figures '1, .3 ,and 4) which are adapted toslide upon .thespaced horizontal .guide .bars 2t and .are t connected by.an integral web portion elle. The iront wallor the web -portiondQ istangent to the ituhular castings Sill and 39.8 to provide a ilushwalhsurface 3m for ,receiving an adjustable face plate 3H .which isadapted to loe held in .place oy meansof .anchoring .bolts 3 2 receivedin arcuate.- 'ly curved slots 3|3 in the face plate .13| .l .so as tovpermit adjustment of .said face plate .about its center.

Hingedly secured .to the face plate .all a reciprocating tool carryingplate .3M `and said plete .is notched :at its upper end as at .31.5 forreceiv- .ing .hinge lugs 31.6 .carried ley and formed integral the faceplate 3M. Pintleloolts 3H .are ,passed through the lugs .3l-6 .and havetheir .inner .ends threaded yin threaded openings .3 |,8 extendinginwardly .from `the .notched end 3|5..

.Secured to the .hinged tool supporting plate .3M is a .tubular .bearing.member .31B `(Figure l/i-D which .extends rearwardly through enlargedaligned Openings .32.9 `and `32| in .the face plate 3H .and sweb.portion .309. The .tubular hearing member l3|9 is flanged as .at .322.and is adapted .to -be .seF cured to the rear wall of the .hinged toolsupportging plate .3!!! by Asuitable anchoring screws as vat .3.23. Thehinged ltoolsupporting `plate 3M .is pro- .uided .with .a hearingopening V32d which is axial..- .ly-.aligned Y.with Vthe .bearing openingi255 ,in the .tubular bearing ,member .3!!! and rotatably ,mounted .in.the lhearing Portions' .32d .and 325:15 ,a rotary shaft 3.26 .having.an .eccentric pin 32.1 at one end thereof, while the other end is :pr.ovided with a .stepped grooved pulley 32B for. e ing drivingly connectedto .a motor in .ainannei' iwhich will be hereinafter 4more fully`described.

Formed on the hinged cutting tool support .3U ,and oiset from the centerthereof is .a tubular ,guide .329 4having .a bore 330 `for receiving .aite.- .ciprocating plunger 33|. The upper end .of .the Areciprocatilrig`plunger 33| is .flattened .and ,piro- 'vided with an elongated slot 332(Figure '5) for dit) receiving en adiustable bol-t 3,3;3 carried by theend of a pivoted oscillating lever` A334,. The di.- ameter of the bolt3.33 may he reduced so as to pass through the slot 332 and he held inplace. by a nut orvt'he like as at 335. The lever 33d is nivo-ted to asupport 331.6 having depending arms 3.3i and 338 extending on -bothsides of Ithe pivf .oted lever 33.4., and pvoted thereto by means O-.f apivot pin .33.9 carried .by .a slide block ctc mount.- ed forlongitudinal movement in an elongated .slot 3.41 in .the pivoted lever331i. The -support 33t isvprovided with a projection 342 (Figure fi)which is slidably received in a slot 3433 extend.n ing inwardly andtransversely of the hinged cutting `tool support 3m. The support 335 ispro.-

vided with an opening for receiving a bolt 344,

which is adapted to ce received in a nut 345 slidahly mounted in anundercut slot 34e eX.- tending inwardly from and parallel to the slot'34313, Tightening of the holt 3M will cause the nut 345-410 clampinglyengage the undercut slot 3,56 and .lock the fulcrum support 336 .in apredetermlnedvadjusted position. The .oscillating lef ver 3.314 is.connected with the rotary shaft 3 2-.6 by means of a pitman @el whichhas one .of its ends pivotally secured as at 348 to the oscillatfginglever 331i while the .other end is received on .the eccentric lpin 321 Aclamping disc 348 is secured to the enlarged head portion .350 of thepitinan 361 to retain :the same in place .and a retain-ing screwl isthreaded in an axial bore .in the eccentric -pin 321 to retain thewasher .345 in place.. A guide block 353 is secured to the .hinged toolsupporti-ng plate 3M by means of t machine screws or the like as at 354and said .guide block is provided with a guide groove 3 56 for receivingandguiding one end of the oscil lating lever 330| so as to hold thepitman 3d] in :alignment with the eceentrio pin 327. An adjustin g screw.357 is threaded in an 'opening 358 in the hinged tool .supporting plate3M so that the .inner end :thereof may he received i-n a Vthreadedopening' in .the -face plate 3| The adjusting holt 351 is provided witha head having a `rou-nded under porti-on to permit slight relativemovement between the hinged tool supporting plate 3 ldandadiusting bolt351.

'The drive motor 3:58 iFigures 3 and 4) has its base 359 mount-ed yon ahinged platform 350 secured to an offset portion 36d extending along-lthe tubular casting 3.01. The platform 350 is pro.- v-ided withAspaced hinge `eyes Sii-i for being cou- ;.pled to a hinge .plate 36.2by means 4of a suit-.- able pintleyor the like .363. The free swingingend .of the .hinge .pla-te 3.69 lig provided 4with .an adjusting screwy3.6i having a lock nut 3de vand thumb piece 3&6 :to facilitate theadjusting there- `of in any .desired position-to .compensate for theadjustment of .the face plate 3H and tool suppcat-ing plate 3i-4respective-ly. The armature shaft Metil-cometer 35.8 lis provided with1a pulley .louer which is :trained a pulley belt :del for .driving the.step pulley 328 on :the shaft .3215.

The Giver end '.ofathe reciprocating plunger 33| 'is grprlo: .ded Awith.axial :here 3.68 for receiving `the .shank portion .of vadapter 341i@ towhich is hinged .a tool holding :chuck 31rd as ratSH. The foihuck 37|@is arranged with the hinge point 31| offsetl from the center thereof'and -a small leaf spring 3'172 is secured to the adapter 315551 as at`313 so thai-,the free end thereof will engage lthe chuck 23];0 and urgerthe ohnehin a straight line position. .A ,cutting .tool 31d is .mountedVin -`a socket 33Min the '.chuclsfl and .said cutting tool is providedwith ya cutting portion 378 at the lower end thereof. ySet screws 311an-d 318 are provided for holding the adapter 359 in the Abore 358 andthe tool 314 in the bore o-f the chuck 315 respectively.

In order to adjust the face plate 3i I an adjusting cam 319 (Figures 3and 5) is mounted on a stub shaft 380 which has one of its ends reducedas at 391 for reception in an 'opening 302 in the web 309. The cam 319is cut away as at 383 to prov-ide a disc portion 334 which is graduatedas at 305. A pointeris adapted to register with the graduations 385 andincludes a block 595 affixed to the web 909 by means of machine screwsor the like 381. The cam 319 is positioned so that its peripheral edgeis in engagement with one of the edges of the adjustable face plate 3i Iso that turning said cam by means of a knurled portion 398 said platemay be moved about its center as permitted by .the adjusting screws 312and the arcuate slots 353. set screw 339 `is threaded in the knurledhandle portion 388 so as to lock the cam 319 in a predetermined adjustedposition on the shaft 380. The block 3515 is provided with an extension39 which overlies the cutaway portion 393 of the cam so that anindicating mark 39I may register with Ithe graduations 395 and therebyindicate the number lof degrees of angular movement of the plate 3l Iabout its center.

In order to hold the tubular castings 301 and 308 in a predetermined setposition, the clamping screws 392 and 393 (Figure 4) are passedtherethrough so that the inner ends will engage the slide bars 29 andhold the tool carriage in position. The clamping screws 392 and 393 vareprovided with handles 394 and 395 respective- 1y so as to obtainclamping leverage or purchase when tightening or loosening the screws.

Extending between the frame uprights I9 and is a rotary screw feed shaft395 (Figure 1) having one or" its ends Vjournalled as at 391 in theupright 29 and its opposite end journalled in a bearing portion 395 inthe upper end of the upright i9. The cutting tool supporting carriage 1is mounted in front of the rotary screw feed shaft 395 so that a bracketmember 399 (Figure 4) may be drivingly engaged thereby and said bracketmember is fastened to the rear wall of the web 399 by means Iof screwsor the like 400.

As shown clearly in Figures 1, 2 and 17, the screw feed shaft 395extends into the bearing portion 399 of the upright I9 and is reduced asat 491 that the free end thereof as at 402 may project through anopening 403 in opposed relation to the bearing portion 39B for receivinga hand wheel or the like as at 494. A manual operating hand wheel 405 issecured to the handle 494 so as to rotate the screw feed shaft 395manually.

The annular bearing portion 398 is provided with a bore 406 in whichthere is received a sleeve 401 having an annular flange 408. The sleeve451 forms an. abutment for a gear casing 409 which is secured to theannular bearing portion 39B by bolts which extend through a flange 4Hformed on the gear casing 409 and have their ends received inscrew-threaded openings in the annular bearing portion 398. The sleeve401 is provided with an internal ange 4I2 thereby forming a chamber forreceiving and housing an annular enlarged portion 413 of the screw feedshaft 395 which is adapted to engage an abutment ring 414 which isthreaded Within the sleeve 401 as at 415. A cup-shaped abutment 4I5 isalso received in the sleeve 401 and has a portion A knurled thereofengaging the annular enlargement 4I3 and a portion engaging the inwardlydirected flange 4 I2. A ring-like member 4I1 is secured to the sleeve401 by means of machine screws 4I8 and said ring-like member is providedwith an indicating mark 4I9 adapted to register with a series ofgraduations 420 on a graduated disc 42|. The hub 422 of the graduateddisc 42| is adapted to be locked or secured to the rotary screw feedshaft 393 by means of a knurled set screw 423.

Rotatably carried by the sleeve 401 (Figure 17) is a tubular shaft 424which has formed on one end thereof a bevel gear 425 while the other endis threaded for receiving a locking nut 426 to prevent endwise movementof the tubular shaft 424 but yet permit rotation thereof on the shaft40I. Formed integral with the gear casing 409 is a bearing portion 421in opposed relation with the annular flange 4I2 and axially alignedtherewith for receiving the tubular shaft 428 carrying a bevel gear 429.A retaining nut 439 is threaded on the tubular shaft 428 to preventendwise movement thereof in identically the same manner as the retainingnut 425. Also formed integral with the gear casing 409 is an offsethousing portion 43| having a bearing portion 432 and a cover 433provided with a bearing portion 434 for receiving a stub shaft 435.Keyed as at 431 to the stub shaft 435 is a worm wheel 436 and said wormwheel is adapted to be driven by a worm 438 suitably journalled in theoffset portion of the gear casing 431. One end of the stub shaft 435projects into the gear casing 409 and is provided with a bevel gear 439which is keyed thereto as at 44. The bevel gear 439 is interposedbetween the bevel gears 425 and 429 so as to simultaneously be indriving engagement therewith and as noted above, the bevel gears 425 and429 are mounted for free rotation with respect to the shaft 40| and areadapted to be connected therewith by means of the reversing clutchincluding opposed clutch elements 441 and 442 for being received inclutch recesses 443 and 444 respectively in the bevel gears 425 and 429.The clutch elements 44| and 442 are formed integral and are movablealternately into engagement with the clutch recesses 443 and 444'. Theclutch shifting lever 445 is pivoted as at 446 to abracket 441 securedto the gear housing 409 so that the free ends of the clutch shiftinglever 445 may project externally of the gear casing 409 and be providedwith a handle 443 for the purpose of manually controlling the same. Theinner end of the shifting lever 445 is provided with a pin 449 which isre- -ceived in an annular groove 450 in the movable clutch element sothat when the lever 445 is oscillated between the limits of its twopositions of movement, the clutch elements 441 and 442 will engage theirrespective recesses 443 and 444. The clutch elements 44| and 442 arekeyed to the shaft 49| by means of a key or gib 452 so as to be free toslide longitudinally of the shaft 40I but yet be restrained againstrelative rotational movement. The drive worm 439 has its shaft extendingexternally of the offset portion of the gear casing 43| for connectionwith a drive shaft 454 (Figure 1) which is adapted to be connected to anelectric motor controlled by a thymotrol speed reduction unit.

Also extending between the frame uprights I9 and 29 is a graduated bar455 which has one of its ends received in a tubular bracket 45B(Figure 1) while its opposite end is connected to an offset bracket 451(Figure 2) secured to the upright I9 by machine screws or the like 458.The offset bracket 45'| is connected to the graduated bar 455 by meansof a screw or the like as at 453. A series of graduations 460 are formedon the graduated bar 455 so as to determine the position of the cuttingtool frame 'l when the same is moved either manually or mechanically bycontrol of the hand wheel 404 or mechanical operation of the drive shaft454. Secured to the web portion 309 of the cutter carriage l andextending parallel with the graduated bar 455 is an elongated pin 40|upon which is mounted an adjustable slide box 4t2 having a pointer 463adapted to register with the graduations 450 on the graduated bar 455. Aset screw 464 is threaded in the adjustable block 462 to permitadjustment of the block and pointer 453 to predetermined positions ofadjustment.

Operation of the invention While the machine tool above described isprimarily intended for making male and female die members, it is to beunderstood that the same may be used for various other cuttingoperations in substantially the same manner as conventional millingmachines for producing the same Work accomplished thereon. The operationof the invention will be described in connection with the formation of adie member having radially extending slots rounded at the ends on apredetermined arc with the slots connected by a similarly curved portionadjacent the center of the die.

In operation, the work piece or stock is placed on the indexing head 238and secured thereto by means of suitable fixtures fastened in place bybolts secured in the undercut slots 281. After the work is thuspositioned, the compound slide 8, including the slides 202 and 243 iscentered with respect to the rotary table 6 and the machine toolcarriage l' is positioned so as to bring the cutting tool 314 intoregistry or alignment with the center of the work and center of theindexing head 238. It is to be understood that an indexing disc 288(Figures 6 and 8) having a number of notches 294 equal' to the number ofradial slots in the work piece has been provided and securely clampedbetween the drum 213 and indexing head 233. After the parts have thusbeen arranged, the motor 350 is started to cause reciprocation of thetool through the medium of the pitman and crank level 347 and 334respectively (Figures 1 and 3). Next, the compound slide 8 is moved tocause the work to be cut along a radial path from the center thereof tocut or form one of the walls of one of the radial slots depending uponthe position of the notches in the indexing plate 288. After thecompound slide has been moved to accomplish the radial cut, in the abovemanner, the rotary Work table 5 may be rotated a predetermined angulardistance to produce an arcuate cut at the end of one of the walls ofsaid slot so that the work piece may then be moved in a radial straightline path or returned to the center thereof and to the center of theindexing head, compound slide and rotary table 5. At this time it may bewell to state that the radial Slots in the work piece are formed bydrilling a series of radially aligned holes extending from the center adistance equal to the length of slot desired or approximately so,whereby the cutting tool 314 may out the walls formed by said series ofradially aligned bore holes to the exact dimensions. In variousworkpieces it is desirable to arcuately curve the intersecting point ofthe slots and to facilitate the curving or" said portions, the compoundslides 202 and 243 are offset so as to position the work beneath thetool so that partial rotation of the rotary table 0 will swing the workabout an arc as desired.

As a concrete example, let it be supposed that a work piece is to be cutWith a slot 2 inches long extending from the center thereof to the outerportion of the work piece and that the slot is to be formedapproximately .5 of an inch. With the parts in their central. position,including the compound slide 8, indexing head 9, and With the workpositioned `on the indexing head, the tool supporting carriage 'l isshifted approximately .25 of an inch equal to the radius of the curve ofthe slot. In addition, the slide 202 is shifted two inches from itscentral position as shown in Figure 1 by manipulating the hand wheel 223so as to move the slide a corresponding distance denoted by thegraduated scale |33a and pointer 202e. After the slide 202 has thus beenshifted a distance of two inches minus the .25 of an inch or radius ofarc desired, so as to move the center of said arc in alignment with thecenter of said rotary table 6, the next thing to determine is theangular movement of the table 5 so as to produce an aro of approximately180 degrees. In determining the length of arcuate movement of the rotarytable t for cutting arcs of 180 degrees and less, the sine of the anglecan be found since the distance from the center of the Work piece to thecenter of arc is known as is also the width of said slot and thus bytriangulation the angle of movement ofthe rotary table 6 can be easilycomputed to the exact degree. When it is desired to cut an arc of lessthan 180 degrees, the angular rotational movement of the rotary table 6is found by dividing one half of the width of the slot by the radiusthereof so as to find the sine of the angle through which the rotarytable G is to be moved. Once the sine of the angle is determined, thenumber 40 of degrees of movement can be found by consultingtrigonometric tables. For work pieces having arcuate slots requiringonly a tenr degree movement' of the rotary table 5, the hand wheel |69is rotated and turned a sufcient amount so as to rotate the support 6 adistance equal tothe distance between the graduations |49 and therebyturn said table about said work piece through an angular distance by therequired amount.

When it is desired to form arcuate cuts inthe work piece about anangular distance other than increments of ten degrees, the rotary table(i is adjusted to the predetermined settings in multiples of tendegrees' and the micrometric adjustment including the adjusting rod |00'and osciliatable lever '55" yare shifted by manipulating the handwheel' |25 a predetermined amount in accordance with the graduations |34on the hand wheel and graduations |34a on the control rod |00. As notedabove, the graduations |34 are adapted to represent linear distancecorresponding to the sine of 'the 'angle desired,A such as degrees,minutes and seconds, so that the rotary work table maybe set to allpositions of angular adjustmentwit'h the adjustmentof the table byment". ofV theA slides :2115iy .and 4.243, S the.. slidesY aremanipulated by operation ofthe hand.; wheels 223 and 261' so`1` ast'ooi's'e't tlezworl;v piece by 'a predetermined. amount and position'. theAsameV with respect to the cuttngftoolffwhicl'r haslikewise beenoffsetifrom the center oftherotary work table 6 a-'distance .equal'tothemadius-foi Aout desired. With theworkl piece-md cutting; tool thusoffset, various varcuate cutszmay be formed-1 therein and if: desired,the cutting tool: .may bey angled by manipulating ther'ad'justingiieam:tilgfso as to reciprocate the cutting. tool" along a line angledslightly to a-perpendicula11 position.; In'. certain lcases of; diecutting, it isdesirabletoi slightly taper thezwall. ofthev dieopeningandhby simplyY turning' the 'cam 315i a predetemnined angular distance,`.the faceplate 3H andfvhinged cutting tool support 3114-' may bev moved'a corresponding: distanceabout :their centerso': aslV to" angularly`position the: ciu-,tingY :toorn-ttor thetapering of the die walls.

Obviously,..icutsr of difierentnshapes: and designs may be. producedbsrl rn'anipulatingiY the various controlszrfor .the rotary-table Si,tool carriage 1,

compound slides and .indexinghead e.V During the. cutting ot straight'lin'ewcutsgihe screw feed shaft 296 for the cuttlngtoolicarria'ge i maybe operated'. by the tnymotrolspeed reduction motor, orasabove describedmaybe controlled by the handle 4M byzsiinply 'sluiting `:the :lever 445thereofi.D Similarly,ithef.slides 292i and ,1243: may bel mechanicallyzdrivemvwhilefmakiug various straight. line by manipulating knurled handcontrol 23:8 so. asztol 'drivingly connect. the scri-ut" feed: shafts291'- and' 151V with their respective thymotrolspeed.reductlontunits'andv motors. During: arcuate" 'outsthe "worklzmay be `rotated by thedrive'mechanism shownxand v'described in Figures ilandli-byfshifting theleverf92 through titel medi-umfofi the'.` hand `control:knobrv 9D" so astof connect the thyxnotrol'-V speed .reduction motor uitlwithvtheWoimnlfotr intt'he` case of being manually operated, 'with the-.handwheeli's. As pointed out'abovaf-thenlockiue' bolt 6T for the `tablet isadapted -rto position tnertable so thatthepointer-:i 5,2 will registerwith-one ofthe tenfideeree markmgsifi Asorf graduations on thebevelfsurface HB ofzsaiii.tableV In this manner, the table is located inan exact angularlposition altiendegreenteivalsand adjustingthe rod r 180through rotation nofth'e; Wheel 5126, the locking boltlmay be; smitedtoposition ythe same between angular distans; less. than tenrdegrees.

By reason- "oi theA thymotroil speedareduction motor units :which areemployed for rotating the tablel t; operating the compound slidefa andmoving the ltool':supporting* 'carriage 1, the machine 'may be operatedmechanically Without. requmng the usel ormanualcontrols therefor,` suchas the 'various mamuallyfcontmlled'handvwheels for the parts aboveenumerated;

It tsltobeunderstood that afterfa radial, cutis made, as above pointedout in. the workpiece, the leVer-"Mlgure'su :and 8): maybe swung so asto withdraw the detent 302 .from vits/detentAopenlng 294- so that' theindexinghead 283 frnay* be shifted. toa new angular positionwhereupon'said detent 302 will fall intof anotherv onieofk said detentopenings i2941; The clamping plate 305 is employedduring the initialsetting of the indexing head 283 With thedetent' 3D2-in one of thedetent openings 294 so as torcorrectly position the-work with respecttoltherotaa'y tableorsupport E and compound slide 8) It' is' to beunderstood that' the form of `the invention herewith vshown' anddescribed is to be taken asa preferred embodiment Aof the same and thatvarious changes may be'made in the shape, sizeand arrangement of part-sWithout departing iromthe spirit vof the invention or the scope iof thesubjoined` claims.

. What I claim is:

1. In a machine tool having abasev with a vertical frainel structure anda tool carrier mounted thereon, the combination of a turntablerrotatably mounted on said base on a vertical axis of rotation, mechanismfor rotating said turntable, a slide reciprooabl-y mounted upon saidturntable for motion diametrically thereof, mechanism for reciprocatingsaid slide, a cross-slide'reciprocably mounted upon said` slide for"motion transversely to said slide, mechanism for reciprocating saidcross-slide, and a rotary;work;holder rotatably mounted upon saidcross-slide.

2. A1n a vina'cloine'tool having a base with a vertical frame structureanda .tooll carrier mounted thereon, the combination of a.turntablerotatably mounted on said base ona verticalaxis of rotation,mechanism for rotatingisaid turntable, a slide reciprocably mounteduponssaid turntable Aformotion diametrlcally thereof, mechanism forrecirprocating` said slide, a 'cross-slide reciprocably mounted uponsaid slide for motion .transversely to said slide, mechanism forreciprocating said cross-slide, Va rotary vWork-holder rotatablymounted. upon said cross-slide, and a rotary indexing device operablyinterconnecting said workholdei' and said cross-slide.

FERDINAND J. HENKEL.

REFERENCES CITED' The following vreferences are div recordln the le or"this patent:

UNITED STATES `PATENTS Number Name` Date 299,496 Richards May 27, 1884360,530 Kaufholzl Apr. 5, 1.887 846,728 Cochrane fet a1., Mar. 12, 19071,084,544 Hanson et al. Jan. 13, 1914 1,687,350 Rollings- Oct. 9, 19231,745,573 Harten. Feb. 4, 1930 1,968,514 B-rustley ..i July 31, 19342,277,997 Silva Mar'. 31, 1942 2,414,033 Fawkes Jan. 7, 1947 FOREIGN'PATENTS Number Country Date 353,992 Italy 1..---.. Nov. r6, 1937

